Log it again and post up results. There's definitely still weirdness with cylinder two by looking at that plug. Combustion products seem to pass the threads on that plug more easily for some reason. I would scope it from the intake valve side, while the plug is out in order to inspect the plug hole where it enters the combustion chamber. I'm going to guess that the failed electrode earlier caused damage in the area around the hole where the plug protrudes. It looks a bit oily, too. That combined with the low compression may point to cracked or broken ring lands on the piston, possibly a result of that poor tune earlier. If that's the case, it will likely only get progressively worse in that cylinder. Monitor it with logs for a while to keep an eye on it.